What causes a motorcycle to have no-spark?

What causes a motorcycle to have no-spark?

If you are having a no-spark problem, a good place to start after ruling out shorts, grounds, switches and spark plugs, is the ignition coil, spark plug caps and wires. A breakdown in the insulation can cause arcing in the plug wire. You will be able to see the wire spark in low light conditions.

Is a coil pack grounded?

The coil does not need an electrical ground, but it does need a thermal ground for heat dissipation, meaning that the “ground” could be compromised by paint etc. and still serve its purpose as a thermal point of dissipation.

What causes a Harley Davidson engine to misfire?

Click to expand… The front plug could be fuel fouling due to loss of spark enough to burn all the fuel, or could be a mechanical problem I E valve or compression problem, Have you verified compression?

Why is my Harley Davidson not running at low speeds?

It had decel popping that prior owner told me about – he thought the fuel mapping was off (has RevTech DFO), but dealership told him they had “optimized” it. However, since I bought it the engine is not running well at low speeds.

Is there a Repair Manual for a Harley Davidson?

Motor Era offers service repair manuals for your Harley-Davidson XL1200C 1200 Custom – DOWNLOAD your manual now! Harley-Davidson XL1200C 1200 Custom service repair manuals

Why does my Harley Davidson engine pop when I idle?

After coming to a stop, the idle is a bit rough and sometimes the engine acts like it wants to cut out for a few seconds after which it seems to idle OK. The popping/backfire also continues about the same on decel as when I got it.

Why does my Harley Davidson cylinder misfire?

When your vehicle’s crank position sensor is failing, then you’ll notice the cylinder misfire. This is because it is unable to provide your vehicle’s computer with correct piston position information. When your Harley Davidson’s crank position sensor turns bad, you’ll notice the acceleration performing unevenly.

What does p0374 mean on a Harley Davidson?

This is a diagnostic trouble code for vehicles with an engine position sensor. For a Harley, the P0374 code may be shown when the powertrain control module (PCM) detects no pulses from the position sensor. Besides, this code could also mean there is a wiring problem, or the oil is contaminated.

What happens when the crank sensor on a Harley goes bad?

In newer models, the crank position sensor is designed in such a way that it allows you to reach your destination even after it goes bad. Usually, the symptoms of a bad crank position sensor on Harley Davidson are quite easy to notice. For example, you experience slight hesitation with the engine or reduced mileage, etc.

It had decel popping that prior owner told me about – he thought the fuel mapping was off (has RevTech DFO), but dealership told him they had “optimized” it. However, since I bought it the engine is not running well at low speeds.